late 14c., hors, earlier hos, from Old English has "hoarse," from Proto-Germanic *haisa- (cf. Old Saxon hes, Old Norse hass, Dutch hees, Old High German heisi, German heiser "hoarse"), perhaps originally meaning "dried out, rough." The -r- is difficult to explain; it is first attested c.1400, but it may indicate an unrecorded Old English variant *hars. Related: Hoarsely; hoarseness.